RT Journal Article
T1 Study of ionosphere irregularities over the Iberian Peninsula during two moderate geomagnetic storms using GNSS and ionosonde observations
A1 Campuzano, Saioa A.
A1 Delgado-Gómez, Fernando
A1 Migoya-Orué, Yenca
A1 Rodríguez-Caderot, Gracia
A1 Herraiz Sarachaga, Miguel
A1 Radicella, Sandro M.
AB Studies on the irregularities of the ionosphere during disturbed geomagnetic conditions are fundamental to understanding the complex dynamics taking place in the upper atmosphere. In this work, different data sources are used to study the ionosphere effects of two moderate geomagnetic storms, 26-27 February 2014 and 17-18 September 2021, over the Iberian Peninsula. Data are obtained from digital ionosondes in Spain, Italy and Greece; the Global Navigation Satellite System (GNSS) derived Total Electron Content (TEC) and Rate Of TEC Index (ROTI) from several receiver stations in Spain, Portugal and Morocco; and the UPC Quarter-of-an-hour time resolution Rapid GIM (UQRG), vertical TEC global ionosphere maps (GIMs), produced at 15 min intervals by the Universitat Politecnica de Catalunya (UPC, Spain). This analysis showed that, during the two moderate storms, spread-F and high values of ROTI, indicating the presence of irregularities, are found in a very localized area (Southern Iberian Peninsula and northwest Africa) and local times (night-time). However, no irregularities are found eastwards and northwards of the location indicated. We propose some possible explanations for these observations for both the storms, one of them related to the position of the Equatorial Ionosphere Anomaly (EIA) and the other one attributed to the Perkins' instabilities.
SN 2073-4433
YR 2023
FD 2023-01-24
LK https://hdl.handle.net/20.500.14352/73183
UL https://hdl.handle.net/20.500.14352/73183
LA eng
NO © 2023 by the authors.This research was funded by Ministry of Science and Innovation from Spanish Government, grant number IJC2020-044990-I and the APC was funded by Atmosphere (MDPI).
NO Ministerio de Ciencia e Innovación
DS Docta Complutense
RD 11 abr 2025